JP2001208371A - Heat exchanger unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise caused by refrigerant flow by stabilizing the refrigerant flown out of the first heat exchanger and the refrigerant decompressed with a refrigerant throttling mechanism, and avoiding the partial throttling inside the throttling mechanism and the penetration of the noise to the front side of an indoor unit. SOLUTION: A coupling pipe right after the outlet of the first heat exchanger and a coupling pipe just before the inlet of a refrigerant throttling mechanism are arranged upward, and the coupling pipes arranged upward are joined with each other through couplings, each having a certain volume.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger unit for use in an air conditioner capable of a dehumidifying operation in which room air is heated by condensation heat of a refrigeration cycle.

[0002]

2. Description of the Related Art A conventional air conditioner of this type is disclosed in Japanese Patent Application Laid-Open No. 9-42706. Less than,
The conventional air conditioner will be described with reference to FIG.
As shown in FIG. 5, in the conventional air conditioner, the first heat exchanger and the second heat exchanger are connected via a switching valve having a refrigerant throttle mechanism with the shortest connecting pipe, and the switching valve is It was common not to arrange it behind the indoor unit components. In such a configuration, the refrigerant flow sound is generated and amplified by the switching valve having the heat exchanger and the refrigerant throttle mechanism, and the refrigerant flow sound is easily transmitted to the front side of the indoor unit main body.

[0003]

However, in the above-described conventional air conditioner, the refrigerant flowing out of the first heat exchanger flows into the refrigerant throttle mechanism in an unstable state that is not completely liquefied. Discontinuous refrigerant flow noise is generated at the throttle. The refrigerant depressurized by the refrigerant throttle mechanism is:
Since the gas flows into the second heat exchanger in an unstable state in which the gas phase and the liquid phase are mixed, discontinuous sound propagates to the second heat exchanger,
Alternatively, the refrigerant is amplified by the second heat exchanger, and a refrigerant flow noise is generated.
Further, in the refrigerant throttle mechanism, since the pressure is rapidly reduced by a local throttle inside the throttle mechanism, a refrigerant flow noise is generated. As a countermeasure, it was necessary to increase the amount of air blown from the indoor unit to make the refrigerant flow noise hard to be heard.

[0004] The present invention solves the above-mentioned problems, and makes the state of the unstable refrigerant flowing out of the first heat exchanger a stable state, and the state of the unstable refrigerant decompressed by the refrigerant throttle mechanism. Heat used in an air conditioner that is in a stable state and does not perform local throttling inside the refrigerant throttling mechanism, and heats indoor air with the condensation heat of the refrigeration cycle, which suppresses the transmission of refrigerant flow noise, and is capable of dehumidifying operation. It is intended to provide an exchange unit.

[0005]

In order to achieve the above object, a heat exchanger unit for use in an air conditioner capable of dehumidifying operation for heating room air with the heat of condensation of a refrigeration cycle according to the present invention comprises a first heat exchanger. The connection pipe immediately after the outlet of the vessel and the connection pipe immediately before the inlet of the refrigerant throttle mechanism are arranged in the upward direction, and each of the connection pipes arranged in the upward direction is joined by a connector having a certain volume, and the refrigerant throttle mechanism outlet The connection pipe immediately after and the connection pipe immediately before the inlet of the second heat exchanger are arranged in the upward direction, and the connection pipes arranged in the upward direction are joined by a connector having a certain capacity, and the first heat exchange is performed. A refrigerant throttle mechanism having a state in which the flow path resistance of the refrigerant is large and a state in which the flow path resistance of the refrigerant is small, the flow path resistance part and the switching part are independent of the heat exchanger and the second heat exchanger.
This is arranged between the flow paths of the first heat exchanger and the second heat exchanger, and the refrigerant throttle mechanism is arranged behind the electronic control unit mounted on the indoor unit.

[0006] With the above structure, the refrigerant flowing out of the first heat exchanger and the refrigerant decompressed by the refrigerant throttle mechanism are brought into a stable state, and the local throttle inside the throttle mechanism and the transmission of the refrigerant flow noise to the front side of the indoor unit. Is avoided, the flow noise of the refrigerant can be reduced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is characterized in that the connecting pipes immediately after the outlet of the first heat exchanger and the connecting pipes immediately before the inlet of the refrigerant throttle mechanism are arranged in the upward direction, and each of the connecting pipes arranged in the upward direction. The pipes are joined by a connector having a certain volume.

Further, the invention according to claim 2 is characterized in that the connecting pipe immediately after the outlet of the refrigerant throttle mechanism and the connecting pipe immediately before the inlet of the second heat exchanger are arranged in an upward direction, and each of the connecting pipes arranged in the upward direction is arranged. The connection is made with a connector having a certain volume.

Further, the invention according to claim 3 provides a refrigerant throttling mechanism for connecting the first heat exchanger and the second heat exchanger with a state in which the flow path resistance of the refrigerant is large and a state in which the flow path resistance of the refrigerant is low. The flow path resistance part and the switching part are made independent and arranged between the flow paths of the first heat exchanger and the second heat exchanger.

According to a fourth aspect of the present invention, the refrigerant throttle mechanism is disposed behind an electronic control unit mounted on the indoor unit.

According to the present invention, the connecting pipe immediately after the outlet of the first heat exchanger and the connecting pipe immediately before the inlet of the refrigerant throttle mechanism are arranged in an upward direction, and a certain fixed volume for connecting the upwardly arranged connecting pipes. Can stabilize the unstable state of the refrigerant flowing out of the first heat exchanger.

Further, the connecting pipe immediately after the outlet of the refrigerant throttle mechanism and the connecting pipe immediately before the inlet of the second heat exchanger are arranged in an upward direction, and have a certain volume for joining the connecting pipes arranged in the upward direction. With the connector, the unstable state of the refrigerant decompressed by the refrigerant throttle mechanism can be stabilized.

[0013] Also, a flow path resistance portion and a switching portion of a refrigerant throttle mechanism having a state in which the flow path resistance of the refrigerant connecting the first heat exchanger and the second heat exchanger is large and a state in which the flow path resistance of the refrigerant is low. Are independent of each other, it is possible to avoid local restriction inside the refrigerant restriction mechanism.

Further, by disposing the refrigerant throttle mechanism behind the electronic control unit mounted on the indoor unit, it is possible to suppress transmission of the refrigerant flow sound.

[0015]

An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a perspective view of a heat exchanger unit used in an air conditioner capable of a dehumidifying operation in which room air is heated by the heat of condensation of a refrigeration cycle as viewed from the upper right.

In FIG. 1, a connecting pipe 3 immediately after an outlet of a first heat exchanger 1 and a connecting pipe 4 immediately before an inlet of a refrigerant throttle mechanism 9 are arranged in an upward direction.
4 is connected by a connector 7 having a certain volume.

In the above configuration, the unstable refrigerant flowing out of the first heat exchanger 1 during the dehumidifying operation (the two phases of the gas phase and the liquid phase are mixed and not completely liquefied) has a kind of muffler effect. It is rectified inside the connector 7 having a certain volume, flows out of the connector 7, and flows into the switching valve 11 having the refrigerant throttle mechanism. By stabilizing the refrigerant state in this way, discontinuous refrigerant flow noise inside the refrigerant throttle mechanism can be suppressed.

(Embodiment 2) FIG. 2 shows a second embodiment of the present invention.
This will be described with reference to FIG. FIG. 2 is a perspective view of a heat exchanger unit used in an air conditioner capable of a dehumidifying operation in which room air is heated by the heat of condensation of a refrigeration cycle as viewed from the upper right.

In FIG. 1, the connecting pipe 5 immediately after the outlet of the refrigerant throttle mechanism 9 and the connecting pipe 6 immediately before the inlet of the second heat exchanger 2 are shown.
Are arranged in the upward direction, and the connecting pipes 5, 6 arranged in the upward direction
Are connected by a connector 8 having a certain volume.

In the above configuration, the unstable refrigerant flowing out of the switching valve 11 having the refrigerant throttle mechanism during the dehumidifying operation (a state in which two phases of a gas phase and a liquid phase are mixed) has a kind of muffler effect. It is rectified inside the connector 8 having a constant volume, flows out of the connector 8, and flows into the second heat exchanger 2. By stabilizing the refrigerant state in this way,
Discontinuous sound propagating to the second heat exchanger 2 or refrigerant flow noise amplified by the second heat exchanger 2 can be suppressed.

(Embodiment 3) FIG. 3 shows a third embodiment of the present invention.
This will be described with reference to FIG. FIG. 3 is a perspective view of a heat exchanger unit used for an air conditioner capable of a dehumidifying operation in which room air is heated by the heat of condensation of a refrigeration cycle as viewed from the upper right.

In FIG. 1, the first heat exchanger 1 and the second heat exchanger 2 during the dehumidifying operation are connected to a refrigerant throttle mechanism having a state in which the flow path resistance of the refrigerant is large and a state in which the flow path resistance of the refrigerant is low. The flow path resistance section (refrigerant throttle mechanism) 9 and the switching section 10 are arranged independently between the flow paths of the first heat exchanger 1 and the second heat exchanger 2.

In the above configuration, the refrigerant that has been rapidly depressurized by the local restriction during the dehumidifying operation undergoes a gradual flow path resistance and changes state, thereby avoiding local restriction within the refrigerant restriction mechanism. Refrigerant flow noise can be suppressed.

(Embodiment 4) FIG. 4 shows a fourth embodiment of the present invention.
This will be described with reference to FIG. FIG. 4 is a perspective view of a heat exchanger unit used in an air conditioner capable of a dehumidifying operation in which room air is heated by the heat of condensation of a refrigeration cycle as viewed from the upper right.

In FIG. 1, the state in which the flow path resistance of the refrigerant disposed between the flow paths of the first heat exchanger 1 and the second heat exchanger 2 during the dehumidifying operation is large and the state in which the refrigerant flow resistance is low are shown. Flow path resistance part (refrigerant restriction mechanism) with independent refrigerant restriction mechanism
And the switching unit 10 are arranged behind the electronic control unit 12 mounted on the indoor unit.

In the above configuration, the refrigerant flow noise generated in the refrigerant throttle mechanism during the dehumidifying operation is transmitted to the front side of the indoor unit main body because the electronic control unit 12 mounted on the indoor unit exerts a kind of sound insulation wall effect. Can be suppressed.

[0028]

As is clear from the description of the above embodiment,
According to the first aspect of the present invention, the connecting pipe immediately after the outlet of the first heat exchanger and the connecting pipe immediately before the inlet of the refrigerant throttle mechanism are arranged in an upward direction, and each of the connecting pipes arranged in the upward direction has a certain volume. By being formed so as to be joined by a connecting device having the same, it is possible to stabilize the unstable state of the refrigerant flowing out of the first heat exchanger and suppress discontinuous refrigerant flow noise inside the refrigerant throttle mechanism. .

Further, according to the present invention, the connecting pipe immediately before the inlet of the refrigerant throttle mechanism and the connecting pipe immediately before the inlet of the second heat exchanger are arranged in an upward direction, and each of the connecting pipes arranged in the upward direction is connected. By forming so as to be joined by a connector having a certain volume, the unstable state of the refrigerant depressurized by the refrigerant throttle mechanism is stabilized, and the propagation of the discontinuous sound to the second heat exchanger, or Amplification in the second heat exchanger can be suppressed.

The third aspect of the present invention relates to a state in which the flow path resistance of the refrigerant disposed between the first heat exchanger and the second heat exchanger is high and a state in which the flow path resistance of the refrigerant is low. By forming the refrigerant throttle mechanism independently of the flow path resistance part and the switching part, it is possible to avoid local restriction inside the refrigerant throttle mechanism and suppress the refrigerant flow noise.

According to the fourth aspect of the present invention, the refrigerant flow sound can be suppressed from being transmitted by disposing the refrigerant throttle mechanism behind the electronic control unit mounted on the indoor unit.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat exchanger unit of an air conditioner according to a first embodiment of the present invention as viewed from an upper right portion.

FIG. 2 is a perspective view of a heat exchanger unit of an air conditioner according to a second embodiment of the present invention as viewed from an upper right portion.

FIG. 3 is a perspective view of a heat exchanger unit of an air conditioner according to a third embodiment of the present invention as viewed from an upper right portion.

FIG. 4 is a perspective view of a heat exchanger unit of an air conditioner according to a fourth embodiment of the present invention as viewed from an upper right portion.

FIG. 5 is a cross-sectional view of the heat exchanger unit of the conventional air conditioner as viewed from the right.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st heat exchanger 2 2nd heat exchanger 3 Connection pipe just after the exit of 1st heat exchanger 4 Connection pipe just before the entrance of a refrigerant throttle mechanism 5 Connection pipe just after the exit of a refrigerant restriction mechanism 6 Second heat exchanger 7 Connecting device 8 Connecting device 9 Flow path resistance part (refrigerant restriction mechanism) 10 Switching part 11 Switching valve having refrigerant restriction mechanism 12 Indoor unit electronic control unit

Claims (4)

[Claims] 1. A fin tube type indoor heat exchanger in which a plurality of heat transfer tubes, which are inserted at right angles to a plurality of plate-shaped fins arranged in parallel and through which a refrigerant flows, are arranged in a plurality of rows in the direction of air flow. While thermally dividing into a first heat exchanger and a second heat exchanger in a stage direction substantially perpendicular to the flow direction, the flow resistance of the refrigerant between the first heat exchanger and the second heat exchanger is reduced. Connected via a refrigerant throttle mechanism having a large state and a state where the flow path resistance of the refrigerant is small, the refrigerant flows from the first heat exchanger to the second heat exchanger during the cooling operation and the dehumidifying operation, and the heating operation is performed. The refrigeration cycle is configured such that the refrigerant flows from the second heat exchanger to the first heat exchanger at times, and the refrigerant throttle mechanism is set to a state in which the flow path resistance of the refrigerant is large during the dehumidification operation, so that the first refrigerant is removed.
In an air conditioner capable of dehumidifying indoor air with the second heat exchanger while heating indoor air with a heat exchanger, the connection immediately after the outlet of the first heat exchanger during the dehumidifying operation An air conditioner wherein pipes and connecting pipes immediately before the inlet of the refrigerant throttle mechanism are arranged in an upward direction, and the connecting pipes arranged in the upward direction are joined by a connector having a certain capacity. 2. A connecting pipe immediately after the outlet of the refrigerant throttle mechanism and a connecting pipe immediately before the inlet of the second heat exchanger are arranged in an upward direction during a dehumidifying operation, and each of the connecting pipes is arranged in the upward direction. The air conditioner according to claim 1, wherein the air conditioner is joined by a connector having a fixed volume. 3. A refrigerant restricting mechanism having a state in which the flow path resistance of the refrigerant is large and a state in which the flow path resistance of the refrigerant is low is switched between the first heat exchanger and the second heat exchanger with a flow path resistance part. 3. The device according to claim 1, wherein the first heat exchanger and the second heat exchanger are disposed independently of each other between the flow paths of the first heat exchanger and the second heat exchanger.
The air conditioner as described. 4. The air conditioner according to claim 1, wherein the refrigerant throttle mechanism is disposed behind an electronic control unit mounted on the indoor unit.